How do we code "findcontrol" with a third party control? I tried "TextBox" for Namespace="FreeTextBoxControls" Assembly="FreeTextBox" and it threw an error:
Object reference not set to an instance of an object.
Here is the offending line:
Dim Body As String = Convert.ToString(CType(lsvBlocks.InsertItem.FindControl("FreeTextBox"), TextBox).Text)
I got problem finding the Control ID in my ASP.NET page.
When I try to refer that ID, it always give me:
I am trying to refer this:
[Code]....
I pass this id from here:
[Code]....
This is my code behind which is driving me crazy :(
[Code]....
When I use label to display the STRING INTIME, IT GIVES ME "textboxCashier1In"
BUT WHEN I DO THIS:
[Code]....
I have a form with a basic FormView control. The FormView is set to Edit mode by default with only two textboxes and one button. I am populating the FormView using a Datatable from the code behind generated from a SQL Stored Procedure.
The data fills the FormView just fine. I am attempting to update the data using a SQL Stored Procedure by getting the values from the textboxes in the FormView on button click Everything seems to work and I recieve no errors, however the values I type into the textboxes is not passed to the stored procedure so eventhough there are no errors the data is not updated.
I know that the issue is not my stored procedure becasue if I use static values for the parameters in the code behind, the values are updated by the stored procedure.
I placed two plain textboxes and a button on the ASPX form and create a button click event for that button using the same code I use for the butten click event in the formview. When I add values to the non-databound textboxes, the data is updated correctly.
The question is, why can I not get the updated/changed values from textboxes in the FormView control?
Here is my ASPX code:
[Code]....
[Code]....
Object reference not set to an instance of an object. when I try to access these dynamically created controls using FindControl.
I have a dynamically created control within a table cell. The table itself is contained within a page that has a master page. I've tried so many different ways to access this control.
Below is the latest iteration
AttrTable is the asp table, and row.Attr_Type is the name I've given to the control (it iterates through a datatable to set the names for the control)
tmpVal = CType(AttrTable.FindControl("TD_" & row.Attr_Type).FindControl(row.Attr_Type), DropDownList).Text
Below are various ways I've tried to access the control:
Dim form As Control = Page.Master.FindControl("form1")
Dim content1 = form.FindControl("ContentPlaceHolder1")
[Code]....
There is no "Add extender" attached next to third party control.
How to add Ajax extender in a third party control, such as autocomplete extender?
In the gridview we are using edit button. Once the edit button click Controls in the edit template will display in the same row with update button. That row has two dropdownlist control.
Process flow:
controls:d1 and d2
d1 is using sqldatasource for item display : working fine.
d2 is using codebehind code to load the item based on the selected value in the d1 : Not working
How to findthe control in the edit template to display item value for d2.
I have a web application in asp.net 3.5 where i have been using some third party controls i.e. Devexpresv9.2 and on the pages where i am using these controls i normally has to call the register tag on the page markup like for ex:
<%@ Register Assembly="DevExpress.Web.v9.2, Version=9.2.9.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
Namespace="DevExpress.Web.ASPxCallback" TagPrefix="dxcb" %>
<%@ Register Assembly="DevExpress.Web.ASPxGridView.v9.2.Export, Version=9.2.9.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
Namespace="DevExpress.Web.ASPxGridView.Export" TagPrefix="dxwgv" %>
Now i have updated the version of devexpress controls installed on my machine and it has stopped working because the version installed on my machine is v10.0 but my code is looking for v9.2 how can i modify my code in such a way that in future if i install another version then i don't have to modify all the pages and references again.
I have a web report(.aspx page). I like to have a functionality to export that report into pdf format. Is there any way I can export it to PDF format without using any third party control or product? Or any other way I can use report viewer control's export feature in web page and hiding report viewer control?
View 1 RepliesHow to use Control Parameter with SQLDataSource When FindControl is required?
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I want to intergrate Document Management Library into my mvc application. so is there any Document Management Library 3rd party control or service available. so i can easily intergrate it into my site.
View 3 RepliesI am using Asp.net 3.5. In my application I am handling errors at application level in Global.asax. I am using 3rd party control FpSpread in my application. In all the pages where I've that control, it's throwing "File does not exist" error when first time postback occurs in IE (on every postback in FF). From the log I got following Details:
04/01/2010 11:32:18 : The error description is as follows : [URL]
Type- System.Web.HttpException
Message- File does not exist.
Stack Trace- at System.Web.StaticFileHandler.GetFileInfo(String virtualPathWithPathInfo, String physicalPath, HttpResponse response)
at System.Web.StaticFileHandler.ProcessRequestInternal(HttpContext context)
at System.Web.DefaultHttpHandler.BeginProcessRequest(HttpContext context, AsyncCallback callback, Object state) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) Targetsite- System.IO.FileInfo GetFileInfo(System.String, System.String, System.Web.HttpResponse)
It is trying to refer wrong URL because my css is in App_Themes/Blue directory and my page is in /Forms/Company directory. Has anyone encountered similar issue before?? Is this the issue related to theme?? I am not trying to load any images programmatically.
I have a situation where I need to dynamically disable certain controls. I will not be knowing the type of control. I tried to use FindControl(""), but this does not have the "Enabled" property, it only has "Visible" property.
Kindly let me know how this can be done.
I add a select control to a ASPX page like below:
hgc = new HtmlGenericControl();
hgc.InnerHtml = @"<select runat='server' id='my_selectlist'>
<option value='volvo'>Volvo</option>
<option value='saab'>Saab</option>
<option value='mercedes'>Mercedes</option>
<option value='audi'>Audi</option>
</select>";
Then in a Button click event, I use the code below, try to get the value selected
HtmlSelect s = (HtmlSelect)hgc.FindControl("my_selectlist");
label.Text = s.Value;
I get a error:"Object reference not set to an instance of an object."Does anyone try it before?
I have a literal8 inside panel1 and panel1 inside datalist1 ..
i wanna insert the value in literal1 on page load event using query string ...
ERROR on Page Load : Object reference is not set to the instance of an object
how to make this code workin ?
Protected Sub Page_PreInit(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreInit
Dim lit8 As Literal = DirectCast(DataList1.FindControl("Literal8"), Literal)
lit8.Text = Me.Request.QueryString("room")
End Sub
How can I access to the CancelPushButton ?
This doesn't work ! it returns always null !!
var cancelButton = ChangeUserPassword.FindControl("CancelPushButton");
[Code]....
I use the following method to find a control on an asp.net page recursively:
/// <summary>
/// Searches recursively for a server control with the specified id parameter.
/// </summary>[code]...
I hit a problem because it was returning the wrong control. I tracked the problem down to the standard FindControl method, and fixed it by checking that the id of the control returned did actually match the one requested like this:
foundControl = start.FindControl(id);
if (foundControl != null && foundControl.ID == id)
return foundControl;
My question is why does start.FindControl(id) ever return a control that does not match the id requested?
Consider the following code, adding 2 textboxes with the same ID (oops):
protected void Page_Load(object sender, EventArgs e)
{
string TextBoxName = "TextBox1";
Panel p = new Panel();
TextBox t = new TextBox();
t.ID = TextBoxName;
p.Controls.Add(t);
if (p.FindControl(TextBoxName) == null) // <-------*******
{
TextBox t2 = new TextBox();
t2.ID = TextBoxName;
p.Controls.Add(t2);
}
Page.Form.Controls.Add(p);
}
The code is designed to stop adding the same ID twice. However, the Panel.FindControl() method is not finding a control that was added in the previous line of code.
Am I using this in the wrong way?
I mean - sure - I could manually iterate through the controls in the next level, like:
string TextBoxName = "TextBox1";
Panel p = new Panel();
TextBox t = new TextBox();
t.ID = TextBoxName;
p.Controls.Add(t);
TextBox t2 = new TextBox();
t2.ID = TextBoxName;
bool duplicateFound = false;
foreach( Control c in p.Controls )
{
if(c.ID == TextBoxName)
{
duplicateFound = true;
break;
}
}
if( duplicateFound )
{
t2.ID = TextBoxName + "__0";
p.Controls.Add(t2);
}
But I don't understand why this isn't working, whereas Placeholder controls and UserControls work fine.
The reason I am using Panels is for CSS styling. body > div > input - but still - it isn't working.
I have a PlaceHolder control inside of a ListView that I am using to render controls from my code behind. The code below adds the controls:
TextBox tb = new TextBox();
tb.Text = quest.Value;
tb.ID = quest.ShortName.Replace(" ", "");
((PlaceHolder)e.Item.FindControl("ph_QuestionInput")).Controls.Add(tb);
I am using the following code to retrieve the values that have been entered into the TextBox:
foreach (ListViewDataItem di in lv_Questions.Items)
{
int QuestionId = Convert.ToInt32(((HiddenField)di.FindControl("hf_QuestionId")).Value);
Question quest = dc.Questions.Single(q => q.QuestionId == QuestionId);
TextBox tb = ((TextBox)di.FindControl(quest.ShortName.Replace(" ","")));
//tb is always null!
}
But it never finds the control. I've looked at the source code for the page and the control i want has the id:
ctl00_cphContentMiddle_lv_Questions_ctrl0_Numberofacres
For some reason when I look at the controls in the ListViewDataItem it has the ClientID:
ctl00_cphContentMiddle_lv_Questions_ctrl0_ctl00
Why would it be changing Numberofacres to ctl00? Is there any way to work around this?
UPDATE:
Just to clarify, I am databinding my ListView in the Page_Init event. I then create the controls in the ItemBound event for my ListView. But based on what @Womp and MSDN are saying the controls won't actually be created until after the Load event (which is after the Page_Init event) and therefore are not in ViewState? Does this sound correct?
If so am I just SOL when it comes to retrieving the values in my dynamic controls from my OnClick event?
UPDATE 2:
So i changed the code i had in my Page_Init event from:
protected void Page_Init(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
//databind lv_Questions
}
}
to:
protected void Page_Init(object sender, EventArgs e)
{
//databind lv_Questions
}
And it fixed my problem. Still a little confused as to why I want to databind regardless of whether it's a postback or not but the issue is resolved.
So all I want to do is simply find a user control I load based on a drop down selection. I have the user control added but now I'm trying to find the control so I can access a couple properties off of it and I can't find the control for the life of me. I'm actually doing all of this in the master page and there is no code in the default.aspx page itself.
MasterPage.aspx
[Code]....
MasterPage.cs
protected void goToSelectedPage(object sender, System.EventArgs e)
{
temp1 ct = this.Page.Master.LoadControl("temp1.ascx") as temp1;
ct.ID = "TestMe";
this.UpdatePanel1.ContentTemplateContainer.Controls.Add(ct);
}
//This is where I CANNOT SEEM TO FIND THE CONTROL ////////////////////////////////////////
protected void lnkSave_Click(object sender, System.EventArgs e)
{
UpdatePanel teest = this.FindControl("UpdatePanel1") as UpdatePanel;
Control test2 = teest.ContentTemplateContainer.FindControl("ctl09") as Control;
temp1 test3 = test2.FindControl("TestMe") as temp1;
string maybe = test3.Col1TopTitle;
}
Here I don't understand what it's telling me. for "par" I get "ctl09" and I have no idea how I am supposed to find this control. temp1.ascx.cs
protected void Page_Load(object sender, EventArgs e)
{
string ppp = this.ID;
string par = this.Parent.ID;
}
I have been searching a lot about how to create custom server control also creating controls like some third party controlsbut i cant find any resource regarding that, most of the links explained only basic things with custom label,hypher link like that but i wish to learn bit advanced including fundamental concepts.so can any one show me the link/ebook about concepts behind building a re-usable control (properties and property grid integration in VS/VWD, event handlers, rendering, design-time UI, default tag-prefix and naming, toolbox icon, etc)
View 2 Repliesmy web application i use FindControl to retrieve a Control By Name (it returns an System.Web.UI object). The control can be of various type and I don't want to treat them differently: I'd like to set the Text property to a defined string. I hope there's a class that I may use to cast the control and set the Text property.
View 8 RepliesI have a requirement of accessing Microsoft word Document on asp.net web page. It should be opened in asp.net page only. And one should be able to write anything in it. I knw the reference to Microsoft office object library need to be added. that way we can save a word doc or can append any doc on machine. But to allow it to be visible to all on browser ,we should follow the procedure as for activeX controls. by creating Object tag in page source section.
<object id="MS" classid="CLSID:0002034C-0000-0000-C000-000000000046">
</object>
I got an error "A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond".when i am sending email when attachment.
protected void lbtn_DownloadForm_Click(object sender, EventArgs e)
{
using (StringWriter sw = new StringWriter())
{
using (HtmlTextWriter hw = new HtmlTextWriter(sw))
{
pnlPerson.RenderControl(hw);
[code]....
I have the below linqdatasource selecting event to populate my frontend asp.net listview. How do I find a control within my listview's ItemTemplate within this event? My attempted code returns the error: "Object reference not set to an instance of an object" on code line 80? From the debugger I know that "query.UserId;" returns a value so it's my "ratingControl" reference that the debugger can't find?...
[Code]....
my code
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
[code]...
A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 74.125.155.109:465Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.Exception Details: System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 74.125.155.109:465Source Error:
[Code]....
Line 34: mailClient.EnableSsl = true;Line 35: mailClient.Timeout = 1000000; Line 36: mailClient.Send(mailMessage);Line 37: mailMessage.DeliveryNotificationOptions = DeliveryNotificationOptions.Delay;Line 38: mailMessage.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
Source File: d:My
WebsitesBenefitsBenefitsDefault.aspx.cs Line: 36
Stack Trace:
[Code]....
[SocketException (0x274c): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 74.125.155.109:465] System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) +239 System.Net.Sockets.Socket.InternalConnect(EndPoint remoteEP) +35 System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Int32 timeout, Exception& exception) +224[WebException: Unable to connect to the remote server] System.Net.ServicePoint.GetConnection(PooledStream PooledStream, Object owner, Boolean async, IPAddress& address, Socket& abortSocket, Socket& abortSocket6, Int32 timeout) +5482743 System.Net.PooledStream.Activate(Object owningObject, Boolean async, Int32 timeout, GeneralAsyncDelegate asyncCallback) +202 System.Net.PooledStream.Activate(Object owningObject, GeneralAsyncDelegate asyncCallback) +21 System.Net.ConnectionPool.GetConnection(Object owningObject, GeneralAsyncDelegate asyncCallback, Int32 creationTimeout) +332 System.Net.Mail.SmtpConnection.GetConnection(String host, Int32 port) +160 System.Net.Mail.SmtpTransport.GetConnection(String host, Int32 port) +159 System.Net.Mail.SmtpClient.GetConnection() +35 System.Net.Mail.SmtpClient.Send(MailMessage message) +1213[SmtpException: Failure sending mail.] System.Net.Mail.SmtpClient.Send(MailMessage message) +1531 Benefits_Default.Page_Load(Object sender, EventArgs e) in d:My WebsitesBenefitsBenefitsDefault.aspx.cs:36 System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14 System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35 System.Web.UI.Control.OnLoad(EventArgs e) +99 System.Web.UI.Control.LoadRecursive() +50 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627
Version Information: Microsoft .NET Framework Version:2.0.50727.4927; ASP.NET Version:2.0.50727.4927